Screening Of Salt-tolerant Plants And Effect Of Snow-melting Agent On The Microbial Diversity

Highway snow transport brings up a serious impact, or even block the traffic, resulting ineconomic losses, life-threatening security. Chemical deicing long-term use can cause soil,groundwater, river pollution and biological growth affected, and so on. This research to manymajor highway as the main research objects within Hebei, for Highway application of deicingsalt impacts on bio-diversity and selection of salt-tolerant plants, designed to reduce the effectof snow-melting agent on impact of Freeway green landscape and biological diversity. Mainresults are as follows:1. To Hebei area Expressway range within of garden green plant, and Hebei arearesistance salt plant type and Hebei area common garden plant for research object, throughactual investigation and lookup related literature information, filter out for Hebei areaExpressway green planting of resistance thaw snow agent plant27species, by its tolerancesexual is divided into three class: strength patience plant (amorpha fruticosa, and Robiniapseudoacacia, and torch tree, and AILANTHUS altissima, and bread Willow); in the degreespatience plant (ash, and weeping willow, and sumac, and Elm ye Mei, and Myrtle, and FengHua rose, and hibiscus, and Forsythia, and spring); Light tolerance in plants (Henan Cypress,Golden silk willow, Populus tomentosa, golden bough of Sophora japonica, purple Ye Li,sorbaria sorbifolia, Cornus Alba, the golden leaf Ligustrum lucidum, red of Berberis,parthenocissus, pueraria lobata, bison grass, ephedra).Under plant ornamental characteristics and ecological habits, filter out applies YuHighway different plant configuration mode of plant type: Highway Central separated withplant (Henan Cypress, and Elm Prunus triloba Lindl, and ziwei, and Feng Hua rose, andhibiscus, and Red Swiss wood, and Forsythia, and spring, and gold leaves PRIVET, and RedYe Xiaobo, and bison grass, and ephedra, and Pearl MUI, and climbing tiger); Highway slopegreen plant (amorpha fruticosa, and five leaves to Kam, and climbing tiger, and puerarialobata); Highway gutter, and slope road green plant (weeping willow, and gold silk willow, and bread willow, and locust, and Populus tomentosa, and Torch, AILANTHUS altissima, cotinuscoggygria, Fraxinus velutina and purple Ye Li, golden pagoda).Pursuant to filter results and plant of patience features, full considered plant of quarterphase features, design out insurance Tianjin high speed three species Central separated withlandscape mode: a, and to Cypress Cedar mainly, Middle inter ziwei following planting bisongrass, features is create a summer flowers full branch of landscape effect; II, and to CypressCedar mainly, Middle inter ziwei, following planting bison grass, features is to reached Northarea Green by needs of "three quarter has spent, and seasons often green" of effect; three, andto Cypress Cedar mainly, Middle inter Prunus triloba, following planting bison grass, Effect ischaracterized by creating flowers in early spring, and played a good glare effect..2. The Baojin express a surname section of Expressway around the soil micro-organismsfor the study, to the snow-melting agent content for sampling based on, used a solid culturemethod on the collection of soil samples for analysis of bacterial diversity. Expressway slopewithin50m of motorway and expressway within100m of cultivation of prokaryotes as thesnow-melting agent concentration reduction in the amount of an increasing trend,snow-melting agent would have adverse effects on soil microbial diversity.Within50m of the slope of Expressway, motorway within100m of the magnitude ofculturable bacteria, actinomycetes is106; plant culturable bacteria in rhizosphere of magnitudefor107, culturable Actinomycetes in orders of magnitude for106;0distance roadbed meterscomparative single prokaryotic species.Snow-melting agent on rhizosphere microbes affect the number of large, impact on thetype of microorganism smaller. Have an impact on the rhizosphere microbial populations sizeorder of amorpha fruticosa> rose> Henan Cypress, and salt tolerance of three level rankingsare similar, therefore microorganisms of plant salt tolerance of diversity, or can be used as oneof the filter parameter.